198 



MIDDLESBX FLOEA. 



Scrophulariaceae, 67. 

 Scorpiurus, 29. 

 Scutellaria, 73. 

 Scytonema, 162. 

 Scytosiphon, 165. , 

 Sea Milkwort, 66. 

 Sea Eocket, 9. 

 Secale, 133. 

 Sedge, lU. 

 Sedum, 36. 

 Seed-box, 38. 

 Selaginella, 138. 

 Self-heal, 73. 

 Sempervivum, 36. 

 Senebiera, 9. 

 Seneca Grass, 125. 

 Senecio, 55. 

 Sensitive Fern, 137. 

 Sericocarpus, 47. 

 Setaria, 123. 

 Sbadbush, 34. 

 Sbagbark Hickory, 92. 

 Sbave Grass, 135. 

 Sheep-berry, 44. 

 Shepherd's Purse, 9. 

 Shield Fern, 136. 

 Shin-leaf, 63. 

 Shooting-star, 65. 

 Sickle-pod, 7. 

 Sicyos, 40. 

 Sida, 18. 



Side-saddle flower, 4. 

 Sllene, 14. 

 Silphium, 51. 

 Silver-weed, 31. 

 Simarubacese, 20. 

 Sisymbrium, 7. 

 Sisyrinchium, 106. 

 Slum, 41. 

 Skullcap, 73. 

 Slnink cabbage, 98. 

 Smartweed, 87. 

 Smilacina, 107. 

 Smilacese, 106. 



Smilax, 106. 

 Snake-head, 68. 

 Snakeroot, 40, 46. 

 Sneeze-weed, 53. 

 Snowberry, 61. 

 Soapberry, 22. 

 Soapwort, 14. 

 Solanacese, 78. 

 Solanum, 78. 

 Solidago, 49. 

 Solomon's Seal, 108. 

 Sonchus, 69. 

 Sorghum, 124. 

 Sorrel, 88. 

 Sow-thistle, 69. 

 Spanish Needles, 53. 

 Sparganium, 98. 

 Spartina, 124. 

 Spear Grass, 130, 131. 

 Spearmint, 70. 

 Spearwort, 2. 

 Specularia, 60. 

 Speedwell, 68. 

 Speirodela, 98. 

 Spergula, 16. 

 Spergularia, 16. 

 Sphaerozosma, 159. 

 Sphaerozyga, 163. 

 Sphagnaceae, 149. 

 Sphagnum, 149. 

 Spice-bush, 89. 

 Spiderwort, 110, 

 Spike Grass, 130. 

 Spikenard, 42, 107. 

 Spike-riish, 112. 

 Spiraea, 30. 

 Spiranthes, 103. 

 Spirogyra, 159. 

 Spirulina, 164. 

 Spleenwort, 135. 

 Spondylosinm, 159. 

 Sporobolus, 126. 

 Spring Beauty, 17. 

 Spring Cress, 6. 



